There is, of course, ample evidence that nature is asking for help (see, for example, Alarming New Study from the Arctic Council, 5/5/11). There is also a strong case to be made that the precautionary principle requires geoengineering rather than precludes it. In any case, Bolivia has clearly established itself as a leading critic of geoengineering on the international scene. The geoengineering community is wise to follow its next steps closely.